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Best way to remove seized pin?

Discussion in 'Fisher Engineering Discussion' started by JFon101231, Oct 17, 2014.

  1. JFon101231

    JFon101231 Senior Member
    from CT
    Messages: 422

    Trying to remove bottom pin from lift ram and its not budging. Took Deep Creep & BFH out but started to tweak the 2 mounting lugs. Any way to remove and save the piston? Only thing I can think of is angle grinder but then I'll need a new ram...
     
  2. BIG NICKY

    BIG NICKY Member
    Messages: 43

    Heat lots and lots of heat. put a picture of the pin up and maybe we can get a few more ideas
     
  3. JFon101231

    JFon101231 Senior Member
    from CT
    Messages: 422

    Could a propane or MAPP gas handheld provide enough heat? If so guess that's an option but assume that will force a rebuild to replace nuked seals...

    Heat on the pin to make it expand and hopefully break the corrosion etc then try to remove when cool, or heat the lugs and piston so it makes some room and remove while hot?
     
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,924

    Heat the cylinder base not the pin.
    If you got it to move a little then some heat might do the trick. Heat and hit back in, then out, etc..... You can try the mapp gas if that's all you have. Worth a shot.
    Also, try vise grips on the pin head. While heating wiggle it.
     
  5. BIG NICKY

    BIG NICKY Member
    Messages: 43

    I second this ^

    as dieselss said dont heat the pin if you can avoid it cause then the pin will expand and make it tighter. and the back and forth to loosen up some of the rust thats holding it in.
     
  6. Citytow

    Citytow Senior Member
    from phila
    Messages: 548

    oxy acetylene to cherry red b4 melting points , comes off real easy
     
  7. JFon101231

    JFon101231 Senior Member
    from CT
    Messages: 422

    Yeah do not have oxy :)

    To clarify: the pin hadn't budged, I was just starting to bend the two mounting tangs on the headgear by whacking the pin. Will give it a try tomorrow.
     
  8. Tony350

    Tony350 Senior Member
    Messages: 546

    Wheno stuff is rusted together heat it up and douse it with water. The sudden heat cool cycle will often times break loose the corrision. Not suse how much room you between the piston and seal area but if there is enough room you can take a wet rag and zip tie it to the ram just before the seal. As you heat it up use a spray bottle and mist the rag, hope this helps.
     
  9. Citytow

    Citytow Senior Member
    from phila
    Messages: 548

    propane . hook a torch to your bbq tank .heat heat heat, cat piss, heat heat heat then a beating
     
  10. mrv8outboard

    mrv8outboard Senior Member
    Messages: 197

    If you can, cut the pin with a sawsall just inside the mounting tabs. Then you can put it in a press. Also if no press available just drill it out.
     
  11. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,238

    Soak it in PB blaster and let it sit for awhile
     
  12. Ramgto

    Ramgto Junior Member
    Messages: 9

    I had to do this to mine. No heat or rust tool would break it free. Tried drilling it, going to be tough as its a hardened steel. Ended up using a 40 ton press to get it out and even that was having trouble.
     
  13. Mr.Markus

    Mr.Markus PlowSite Fanatic
    Messages: 5,155

    It's been 2 weeks since he posted, hope he got it out by now...
    Be nice if he kept us up to date the suspense is killing me...
     
  14. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,924

    Yea....I'm losing sleep
     
  15. leigh

    leigh PlowSite.com Addict
    from CT
    Messages: 1,987

    x2 my nails are down to the quick!
     
  16. JFon101231

    JFon101231 Senior Member
    from CT
    Messages: 422

    LOL you guys are cracking me up. Have been so busy its still sitting there. Hopefully towards the end of next week I'll have some free time. Once I touch it again I'll be sure to update :)
     
  17. buddymanzpop

    buddymanzpop Senior Member
    Messages: 599

    seized pins

    Just solved this situation, cut the pins with an angle grinder and cutoff wheel, use a shop press to press them out, the gauge went as high as 15,000 psi on one of the pins before it popped so I would say you need a minimum of a 20 ton shop press, I had access to a 60 ton so it was pretty easy but they make quite a noise when the finally break loose. This was all with out any heat too, with the use of a torch it would probably require less pressure to get the pins moving.